A firefighter battles a wildfire near a ranch in Simi Valley, Calif., on Wednesday. The large new wildfire erupted in wind-whipped Southern California, forcing the evacuation of the Ronald Reagan Presidential Library and nearby homes.

A firefighter battles a wildfire near a ranch in Simi Valley, Calif., on Wednesday. The large new wildfire erupted in wind-whipped Southern California, forcing the evacuation of the Ronald Reagan Presidential Library and nearby homes.